WO2005058660A1 - Wischanlage - Google Patents
Wischanlage Download PDFInfo
- Publication number
- WO2005058660A1 WO2005058660A1 PCT/EP2004/014341 EP2004014341W WO2005058660A1 WO 2005058660 A1 WO2005058660 A1 WO 2005058660A1 EP 2004014341 W EP2004014341 W EP 2004014341W WO 2005058660 A1 WO2005058660 A1 WO 2005058660A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- output shaft
- wiper
- wiper system
- bearing
- point
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/16—Means for transmitting drive
- B60S1/18—Means for transmitting drive mechanically
- B60S1/24—Means for transmitting drive mechanically by rotary cranks
- B60S1/245—Means for transmitting drive mechanically by rotary cranks with particular rod arrangements between the motor driven axle and the wiper arm axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/16—Means for transmitting drive
- B60S1/166—Means for transmitting drive characterised by the combination of a motor-reduction unit and a mechanism for converting rotary into oscillatory movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/0413—Modular wiper assembly
- B60S1/0422—Modular wiper assembly having a separate transverse element
Definitions
- the invention relates to a wiper system for wiping windows on a vehicle according to claim 1.
- a windshield wiper system is driven by an appropriately designed electric motor, which usually has a reduction gear with an output shaft.
- the rotary movement emanating from such a motor or its output shaft is transmitted to the at least one wiper blade via suitable transmission means, so that the wiper blade performs the desired wiping movement.
- Such a motor with a corresponding power transmission device is presented in German Offenlegungsschrift DE 36 32 694 AI.
- the power transmission device designed here as a crank is largely rod-shaped and has a step approximately in the middle. One end of the crank is attached directly to an output shaft of the wiper motor. At another end of the crank, a transmission element is provided, to which further power transmission devices can be attached.
- the transmission element can perform a circular movement around the output shaft. Due to the stepped design of the crank, a rotary movement originating from the drive axis of the wiper motor becomes a level above the fastening nut with which the crank is fixed to the output shaft, transmitted.
- the publication DE 43 33 484 AI describes a comparable wiper motor with a largely identical crank.
- An articulated linkage is arranged on a bearing of this crank, via which a movement starting from the wiper motor can be transmitted to further devices of a wiper system, such as a wiper blade.
- crank presented in the document DE 199 47 620 AI which is attached to a drive axle of a wiper motor, differs from the cranks of the above-mentioned publications in that it is not step-shaped but flat and thus has a lower overall height in the direction of a central axis Has drive axis of the wiper motor.
- the wiper system according to the invention has an electric motor designed as a geared motor with an output shaft, which has a free end and a gear-internal end and a motor crank.
- the engine crank includes a first end and a second end that is equipped with a transmission element.
- the first end of the engine crank is rotatably attached to the free end of the output shaft.
- the engine crank is designed such that the theoretical force transmission point of the transmission element at the second end of the engine crank in the direction of a central axis of the output shaft is positioned in the distance between the free end of the output shaft and the gear inner end of the output shaft.
- the invention also minimizes the forces which act on the output shaft during operation of the system and which have to be supported or compensated in particular in the bearing points of the output shaft.
- the entry of harmful tilting moments in the output shaft is reduced and the load on the motor is reduced.
- the wear, in particular of the transmission-side part, of the motor is reduced and its service life is increased.
- the transmission element provided on the engine crank can be a simple cylindrical hinge pin or a ball pin or a double ball pin or it can also be a simple cylindrical bearing shell or a spherical bearing shell or a double ball bearing shell or the like.
- the invention is based on the basic idea that the forces acting back on the output shaft during operation of the windshield wiper system are reduced to a greater extent, the closer the theoretical lines of force action and force transmission points of the system, viewed in the direction of the central axis of the output shaft, are to the bearing center of the output shaft.
- the theoretical force transmission point of the transmission element in the direction of the central axis of the output shaft is positioned essentially at the center of the one cylindrical bearing point or the center point between the two spaced apart bearing points of the output shaft , Positioning at exactly this height would of course be ideal.
- the two ends of the engine crank are arranged offset in the direction of the output shaft.
- the engine crank can be cranked, bent or stepped. If the free end of the output shaft, on which the first end of the engine crank is arranged or fastened, is regarded as a highest point of the output shaft, the second end of the engine crank with the transmission element is arranged below the free end of the output shaft.
- the engine crank according to the invention is to be arranged on the output shaft in such a way that a gradation, bending or cranking of the engine crank, starting from a level of the free end of the output shaft, is aligned or oriented toward an end of the output shaft inside the transmission.
- the engine crank can be operated in a circular manner. This corresponds to the operation of a conventional wiper system, in which the revolving rotary movement of the engine crank is converted into an oscillating rotary movement of the wiper shaft via the downstream transmission. In this case, however, it is not possible to bring the theoretical force transmission point provided on the engine crank in the immediate vicinity of the imaginary plane which runs through the bearing center point at right angles to the output shaft.
- the second end of the engine crank must be designed for a circular movement around the output shaft of 360 ° and more. This can be achieved, for example, in that the engine crank has a sufficient length, taking into account the offset arrangement of the two ends.
- the step or bend can likewise be arranged along the engine crank in a central region or in an end region of the engine crank.
- an embodiment according to claim 17 is suitable, which provides that, when the engine crank is immersed in a free space of the wiper system, parts or sections of the wiper system which are adjacent to the reversing positions of the engine crank are designed as stops for limiting the pendulum movement of the engine crank or are provided with attachment means.
- Figure 1 shows a preferred embodiment of a wiper system according to the invention in a perspective view
- Figure 2 shows another embodiment of a wiper device according to the invention in side view
- Figure 3 shows a part of the wiper system according to Figure 2 in plan view
- Figure 4 shows an alternative embodiment to Figure 3
- FIG. 5 shows various details and the definition of different distances essential to the invention.
- the wiper system shown in FIG. 1 or in FIG. 2 has an electric motor 1 as a drive, which at the same time comprises a reduction gear connected to it.
- the reduction gear includes the output shaft 2, which is rotatably mounted in a cylindrical bearing 4 arranged in the housing 3 and projects with a free end 5 from a housing opening, while its gear-internal end 6 is located within the housing 3 (see also FIG. 2 in this regard) ).
- On the output shaft 2 sits inside the housing 3 a gear wheel 7, in which engages a worm seated on the extended armature shaft of the motor.
- the motor 1 is fastened to a support device 14, which here is formed by a continuous or split support tube, at the opposite ends of which a wiper bearing 15 is fastened in such a way that the central axis 16 of the output shaft 2 and the central axes 17 of the wiper shafts 18 are at least approximately parallel run.
- the support tube can be designed as a whole in a straight line or, as in FIG. 1, have a bend or curvature at least on one side of the motor attachment.
- a rocker 20 is attached to the end of the wiper shaft 18 protruding from the wiper bearing 15, the free end of which also has a transmission element 22. Between the transmission elements 22 of the rockers 18 and the transmission element 12 of the engine crank 8, a gear rod 23 is arranged in each case, which at their opposite ends with the
- Transmission element 8 and one of the transmission elements 22 is rotatably connected.
- the engine crank 8 and the rockers 20 are designed such that their respective opposite ends, viewed in the direction of the central axis 16 of the output shaft 2, are arranged offset.
- the theoretical force transmission point 13 of the transmission element 12 on the engine crank 8 and the theoretical force transmission points 24 of the transmission elements 22 on the rocker arms 20 are Wiper shafts 18 are positioned in the direction of the central axis 12 at a distance A (see also FIG. 5) between the free end 5 and the end 6 of the output shaft 2 inside the transmission. It can be seen that the two ends 10 and 11 of the engine crank 8 are arranged offset in the direction of the central axis 16 of the output shaft 2.
- the engine crank 8 is bent in the direction of the central axis 16 of the output shaft 2 such that the free end 11 of the engine crank 8 engages over the support device 14 and is immersed there in a free space of the wiper system. Since the engine crank cannot rotate completely in this case, the engine 1 works in a reversing manner.
- the engine crank 8 executes an oscillating rotary movement between two reversing positions.
- the wiper system can also be designed in such a way that the motor crank 8 can carry out a circular circular movement of 360 ° and more relative to the central axis of the output shaft 2. In this case it must be ensured that there is a distance in the entire circulation area between the engine crank 8 and the adjacent parts or sections of the wiper system.
- FIGS. 2 and 3 A wiper system according to the invention is shown schematically in FIGS. 2 and 3, the wiper bearing 15 provided to the left of the motor 1 is not shown here for reasons of simplification of the illustration. However, it can be assumed that the wiper bearing (not shown) corresponds in principle to the wiper bearing 15 shown on the right side of the engine 1. It is anticipated that a construction of a wiper system to be aimed at with the teaching of the invention is indicated in FIG.
- the output shaft 2 is mounted with a cylindrical bearing 4 in the housing 3.
- the bearing point 4 has a relatively large extent in the axial direction, which is defined by the distance C between the two ends of the bearing point 4. Furthermore, the bearing point 4 has a center 9, which is located in the middle between its two ends on the central axis 16.
- the engine crank 8 attached to the free end 5 of the output shaft 2 is cranked in the direction of the central axis 16. It plunges with its second end 11 into a free space of the wiper system located to the left of the housing 3 between the housing 3 and the carrying device 14 in order to perform a reversing rotary movement there when the wiper system is operating.
- the theoretical force transmission point 13 provided at the second end 11 of the engine crank 8 moves on the partial circular path 25 (FIG. 3) between two reversing positions. It can be seen in FIG. 2 that the force transmission point 13 in the imaginary plane 26, which runs at right angles to the output shaft 2 and through the center of the bearing point 4.
- the force transmission point 13 is thus of course also positioned within the distances A or B or C, the definition of which can be seen in FIG. 5 and which correspond to the various developments of the invention.
- the support device 14 or its plane perpendicular to the output shaft 2 and through the longitudinal center line of the support device 14 also coincides with the plane 26 in order to achieve the advantages mentioned or to a maximum shape.
- the center 29 to be assigned to the spaced apart two bearing points 28 of the wiper shaft 18 and the theoretical force transmission point 24 of the transmission element 22 present on the link 20 connected to the wiper shaft 18 are positioned in this supposedly force-neutral plane 26.
- the gear rod 23 or its line of action of force is also arranged in this plane 26. In this context too, this means that all of the aforementioned parts or locations of the wiper system are thus also positioned within the distances A or B or C defined in FIG.
- the shape of the engine crank 8 and / or the shape of the housing 3 and the support device 14 could be coordinated with one another in such a way that sections of the housing 3 or the support device 14 were used directly as stops for limiting the pivoting movement of the engine crank 8 become.
- special attachment means could be formed or attached at the relevant points on the housing 3 or the carrying device 14.
- the pivoting range of the engine crank 8 is provided at a different location in comparison with the embodiment according to FIG. 3.
- the theoretical force transmission point 13 of the transmission element 12 belonging to the engine crank 8 is moved here between two defined reversing positions during operation of the wiper system on the partial circular path 30.
- the partial circular path 30 extends from the first end 10 of the engine crank, viewed beyond the supporting device 14. It should be noted that a corresponding partial circular path depends on the specific geometric shape of the wiper system can also be placed in other places or in other spaces of the wiper system.
- the transmission elements 12, 22 shown in the drawing can of course also be attached to the opposite side of the engine crank 8 or the rocker 20, if necessary, and thus exactly in the opposite direction from the engine crank 8 or from the rocker 20 protrude. This could lead to the fact that the engine crank 8 or the rocker 20 is not cranked at all or is less cranked.
- a wiper system with so-called loose wiper bearings is also affected by the invention.
- Such a wiper system does not have a supporting structure, via which the wiper motor and the at least one wiper bearing are also fastened to one another before the wiper system is attached to the vehicle.Rather, the wiper bearings or the at least one wiper bearing and the wiper motor are each separately fastened to the vehicle body, so that the vehicle body the function of the supporting structure is assigned.
- the refinements of the invention result in the entire wiper system having a substantially lower overall height than a wiper system of the comparable prior art. Because of this, the wiper system needs to be installed with a much smaller footprint than is the case with the comparable prior art.
- these refinements according to the invention have the effect that, in the case of the invention, when operating the wiper system, considerably lower forces act on the output shaft than is the case with comparable prior art. This goes hand in hand with a significantly lower load on the motor 4 and possibly on the at least one wiper bearing 15, as a result of which the service life of the motor 4 is extended and the noise level is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Transmission Devices (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502004006527T DE502004006527D1 (de) | 2003-12-18 | 2004-12-16 | Wischanlage |
EP04803954A EP1694540B1 (de) | 2003-12-18 | 2004-12-16 | Wischanlage |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10359968A DE10359968A1 (de) | 2003-12-18 | 2003-12-18 | Wischanlage |
DE10359968.1 | 2003-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005058660A1 true WO2005058660A1 (de) | 2005-06-30 |
Family
ID=34683619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/014341 WO2005058660A1 (de) | 2003-12-18 | 2004-12-16 | Wischanlage |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1694540B1 (de) |
AT (1) | ATE388868T1 (de) |
DE (2) | DE10359968A1 (de) |
ES (1) | ES2303122T3 (de) |
WO (1) | WO2005058660A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010038595A1 (de) * | 2010-07-29 | 2012-02-02 | Robert Bosch Gmbh | Wischervorrichtung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3632694A1 (de) | 1986-09-26 | 1988-04-07 | Swf Auto Electric Gmbh | Elektromotor, insbesondere wischermotor fuer kraftfahrzeuge |
DE4333484A1 (de) | 1992-10-30 | 1994-05-05 | Asmo Co Ltd | Wischeranordnung |
WO2000056582A1 (de) * | 1999-03-22 | 2000-09-28 | Robert Bosch Gmbh | Wischerantrieb mit einem reversierbaren getriebemotor |
DE19947620A1 (de) | 1999-10-04 | 2001-04-05 | Valeo Auto Electric Gmbh | Wischeinrichtung |
DE10125988A1 (de) * | 2001-05-29 | 2002-12-05 | Volkswagen Ag | Scheibenwischeranlage mit einem Reversiermotor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2942757A1 (de) * | 1979-10-23 | 1981-05-07 | Daimler-Benz Ag, 7000 Stuttgart | Scheibenwischer fuer fahrzeuge, insbesondere kraftfahrzeuge |
DE3738924A1 (de) * | 1987-11-17 | 1989-06-01 | Swf Auto Electric Gmbh | Getriebeteil fuer eine wischanlage von kraftfahrzeugen und verfahren zu dessen herstellen |
DE19950488A1 (de) * | 1999-10-20 | 2001-05-10 | Bosch Gmbh Robert | Wischergestänge einer Scheibenwischanlage für Fahrzeuge und ein Verfahren zur Herstellung eines Koppelelements eines Wischergestänges |
-
2003
- 2003-12-18 DE DE10359968A patent/DE10359968A1/de not_active Ceased
-
2004
- 2004-12-16 DE DE502004006527T patent/DE502004006527D1/de active Active
- 2004-12-16 AT AT04803954T patent/ATE388868T1/de not_active IP Right Cessation
- 2004-12-16 EP EP04803954A patent/EP1694540B1/de not_active Not-in-force
- 2004-12-16 WO PCT/EP2004/014341 patent/WO2005058660A1/de active IP Right Grant
- 2004-12-16 ES ES04803954T patent/ES2303122T3/es active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3632694A1 (de) | 1986-09-26 | 1988-04-07 | Swf Auto Electric Gmbh | Elektromotor, insbesondere wischermotor fuer kraftfahrzeuge |
DE4333484A1 (de) | 1992-10-30 | 1994-05-05 | Asmo Co Ltd | Wischeranordnung |
WO2000056582A1 (de) * | 1999-03-22 | 2000-09-28 | Robert Bosch Gmbh | Wischerantrieb mit einem reversierbaren getriebemotor |
DE19947620A1 (de) | 1999-10-04 | 2001-04-05 | Valeo Auto Electric Gmbh | Wischeinrichtung |
DE10125988A1 (de) * | 2001-05-29 | 2002-12-05 | Volkswagen Ag | Scheibenwischeranlage mit einem Reversiermotor |
Also Published As
Publication number | Publication date |
---|---|
EP1694540B1 (de) | 2008-03-12 |
DE10359968A1 (de) | 2005-07-21 |
ATE388868T1 (de) | 2008-03-15 |
DE502004006527D1 (de) | 2008-04-24 |
ES2303122T3 (es) | 2008-08-01 |
EP1694540A1 (de) | 2006-08-30 |
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